Song Ziwen Mansion was built in 1933, with two buildings with a square plan and a construction area of 720 square meters. The cross arcade of the main building has a rough roof like a grass roof and a very simple appearance. Chimneys and tiger windows add to the ups and downs of the block. A small western-style building on one side is the residence of Zhang Xueliang who was imprisoned after the Xi Incident. Now it is the guest house of Nanjing Association for Science and Technology. Located at Beijige 1, it was built at 1933 when Song Ziwen was the Minister of Finance of the National Government, and was rebuilt after the victory of the Anti-Japanese War. The residence is designed by Yang Tingbao Architects, with a building area of 720 square meters. The residence is three stories high and has a reinforced concrete structure. This plane is in the shape of a ruler. It is built on the mountain. The building rises and falls with the mountain.